From b366078e6afd6a5a41ef9a392c67dbba1d8db86b Mon Sep 17 00:00:00 2001
From: Stefan Rueger <stefan.rueger@urclocks.com>
Date: Wed, 19 Jun 2024 00:27:26 +0100
Subject: [PATCH] Provide str_mcunames_signature()

---
 src/libavrdude.h |  1 +
 src/strutil.c    | 21 +++++++++++++++++++++
 2 files changed, 22 insertions(+)

diff --git a/src/libavrdude.h b/src/libavrdude.h
index 5b442212..1eec1ba5 100644
--- a/src/libavrdude.h
+++ b/src/libavrdude.h
@@ -1514,6 +1514,7 @@ char *str_nexttok(char *buf, const char *delim, char **next);
 const char *str_ccfrq(double f, int n);
 int str_levenshtein(const char *str1, const char *str2, int swap, int subst, int add, int del);
 size_t str_weighted_damerau_levenshtein(const char *str1, const char *str2);
+int str_mcunames_signature(uint8_t *sigs, char *p, size_t n);
 
 int led_set(const PROGRAMMER *pgm, int led);
 int led_clr(const PROGRAMMER *pgm, int led);
diff --git a/src/strutil.c b/src/strutil.c
index a5906ad0..d959ef1d 100644
--- a/src/strutil.c
+++ b/src/strutil.c
@@ -1301,3 +1301,24 @@ size_t str_weighted_damerau_levenshtein(const char *s1, const char *s2) {
   mmt_free(row2);
   return i;
 }
+
+
+// Puts a comma-separated list of matching MCU names into array p with n chars space
+int str_mcunames_signature(uint8_t *sigs, char *p, size_t n) {
+  int matching = 0;
+
+  for(size_t i=0; i < sizeof uP_table/sizeof *uP_table; i++) {
+    if(0 == memcmp(sigs, uP_table[i].sigs, sizeof uP_table->sigs)) {
+      if(matching && n > 2)
+        strcpy(p, ", "),  n -= 2, p += 2;
+      size_t len = strlen(uP_table[i].name);
+      if(n > len) {
+        strcpy(p, uP_table[i].name);
+        n -= len; p += len;
+      }
+      matching++;
+    }
+  }
+
+  return matching;
+}